T14B:
Strain Localization in the Lithosphere: From Experiments to Nature III

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Session ID#: 16562

Session Description:
Strain localization occurs throughout the lithosphere and spans orders of magnitude in scale. In the upper crust, seismic and aseismic brittle faults are the primary form of localization; at higher temperatures, ductile processes dominate. A more complete understanding of processes resulting in strain localization can be provided by microfabrics. However, the interpretation of fabric found in naturally-deformed rocks can be challenging because of the complex interplay of factors such as composition, temperature, stress, and strain-rate. Due to the better control of these factors in laboratory experiments, experimental studies enable to link the observed microfabrics to those found in nature and draw conclusions towards the operative deformation mechanisms, allowing further understanding of faulting processes, earthquake dynamics and deformation localization. In this session, we invite contributions from field observations, laboratory experiments, and numerical modeling constraining deformation mechanisms and mechanical and physical properties of rocks in brittle and ductile regimes during localization processes.
Primary Convener:  Marieke Rempe, Ruhr University Bochum, Bochum, Germany
Conveners:  Anna Rogowitz, University of Vienna, Vienna, Austria, Luiz F. G. Morales, Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum GFZ, Potsdam, Germany and Giulio Di Toro, University of Manchester, SEAES, Manchester, United Kingdom
Chairs:  Giulio Di Toro, University of Manchester, SEAES, Manchester, United Kingdom and Anna Rogowitz, University of Vienna, Vienna, Austria
OSPA Liaison:  Marieke Rempe, Ruhr University Bochum, Bochum, Germany

Cross-Listed:
  • MR - Mineral and Rock Physics
Index Terms:

8012 High strain deformation zones [STRUCTURAL GEOLOGY]
8030 Microstructures [STRUCTURAL GEOLOGY]
8159 Rheology: crust and lithosphere [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Expression of Lithospheric Shear Zones in Rock Elasticity Tensors and in Anisotropic Receiver Functions and Inferences on the Roots of Faults and Lower Crustal Deformation (151682)
Vera Schulte-Pelkum, University of Colorado at Boulder, Cooperative Institute for Research in Environmental Sciences, Boulder, United States, Cailey Brown Condit, University of Washington, Earth and Space Sciences, Seattle, United States, Sarah J Brownlee, Wayne State University, Environmental Science and Geology, Detroit, Michigan, United States, Kevin H Mahan, University of Colorado at Boulder, Geological Sciences, Boulder, United States and Anissha Raju, University of Colorado at Boulder, Boulder, CO, United States
Microstructural Damage During High-Strain Torsion Experiments on Calcite-Anhydrite Aggregates (159889)
Andrew J Cross, Washington University in St Louis, St. Louis, United States and Philip A Skemer, Washington University in St Louis, St. Louis, MO, United States
Structural Evolution of a Crustal Scale Tectonic Boundary in the 1 Ga Sveconorwegian Orogen, SW Sweden. (182677)
Aranzazu Pinan-Llamas, Indiana University Purdue University Fort Wayne, Fort Wayne, IN, United States, Charlotte Möller, Lund University, Department of Geology, Lund, Sweden and Jenny Andersson, Geological Survey of Sweden, Uppsala, Sweden
Strain Localization in Crustal-scale Shear Zones and Argon Isotopic Record: Insights from Natural Fossilized Subduction Zones (Cycladic Blueschist Unit, Greece) (128208)
Valentin Laurent1, Stéphane Scaillet2, Laurent Jolivet1 and Romain Augier1, (1)University of Orleans, Orleans, France, (2)CNRS Orléans, Orléans, France
Localization of Ductile Shear on Precursor Pseudotachylyte in the Lower Crust (155020)
Friedrich Hawemann1, Neil S Mancktelow2, Giorgio Pennacchioni3, Sebastian Wex1 and Alfredo Camacho4, (1)ETH Zurich, Department of Earth Sciences, Zurich, Switzerland, (2)ETH Swiss Federal Institute of Technology Zurich, Zurich, Switzerland, (3)University of Padova, Department of Geosciences, Padova, Italy, (4)University of Manitoba, Winnipeg, MB, Canada
Strain Localization near the Brittle-Ductile-Transition along the Cordillera Blanca Shear Zone, Peru (194505)
Cameron A Hughes1, Micah J Jessup1 and Dr. Colin A Shaw, Ph.D.2, (1)University of Tennessee, Department of Earth and Planetary Sciences, Knoxville, TN, United States, (2)Montana State University, Department of Earth Sciences, Bozeman, MT, United States
Strength and Deformation Rate of Plate Boundaries: The Rheological Effects of Grain Size Reduction, Structure, and Serpentinization. (134937)
Laurent Montesi, University of Maryland College Park, College Park, MD, United States and Frédéric Gueydan, Géosciences Montpellier, Montpellier Cedex 05, France
Exploring the various scales of strain localization in deforming continents (Invited) (117927)
Laurent Jolivet, University of Orleans, Orleans, France

See more of: Tectonophysics